Lifting column



FIG. 1 is a perspective view of a lifting column showing our new design, the column being depicted in an extended position;

FIG. 2 is a front elevational view thereof, the rear view being a mirror image;

FIG. 3 is a left side elevational view thereof, the right side view being a mirror image;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof; and,

FIG. 6 is another perspective view of the lifting column, the column being depicted in a retracted position. 

CLAIM We claim the ornamental design for a lifting column, as shown. 